Consolidated Statements of Changes in Shareholders Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Dec. 29, 2012		66,859,864			20,411,736
Beginning Balance at Dec. 29, 2012	$ 379,454	$ 669	$ 173,976	$ 1,042,956	$ (839,517)	$ 1,370
Net income	146,009			146,009
Dividends	(15,921)			(15,921)
Purchases of common stock (in shares)					1,116,673
Purchases of common stock	(59,496)				$ (59,496)
Issuance of stock related to stock-based compensation plans, including excess tax effect (in shares)		157,994			284
Issuance of stock related to stock-based compensation plans, including excess tax effect	906	$ 1	920		$ (15)
Stock-based compensation	4,911		4,911
Other comprehensive loss	(1,382)					(1,382)
Ending Balance (in shares) at Dec. 28, 2013		67,017,858			21,528,693
Ending Balance at Dec. 28, 2013	454,481	$ 670	179,807	1,173,044	$ (899,028)	(12)
Net income	138,809			138,809
Dividends	(56,479)			(56,479)
Purchases of common stock (in shares)					939,872
Purchases of common stock	(56,393)				$ (56,393)
Issuance of stock related to stock-based compensation plans, including excess tax effect (in shares)		250,959			5,766
Issuance of stock related to stock-based compensation plans, including excess tax effect	2,219	$ 3	2,408		$ (192)
Stock-based compensation	6,797		6,797
Other comprehensive loss	(1,173)					(1,173)
Ending Balance (in shares) at Dec. 27, 2014		67,268,817			22,474,331
Ending Balance at Dec. 27, 2014	488,261	$ 673	189,012	1,255,374	$ (955,613)	(1,185)
Net income	147,689			147,689
Dividends	(13,088)			(13,088)
Purchases of common stock (in shares)					2,497,748
Purchases of common stock	(161,152)				$ (161,152)
Issuance of stock related to stock-based compensation plans, including excess tax effect (in shares)		122,799
Issuance of stock related to stock-based compensation plans, including excess tax effect	(95)	$ 1	(96)
Stock-based compensation	6,925		6,925
Other comprehensive loss	(2,303)					(2,303)
Ending Balance (in shares) at Dec. 26, 2015		67,391,616			24,972,079
Ending Balance at Dec. 26, 2015	$ 466,237	$ 674	$ 195,841	$ 1,389,975	$ (1,116,765)	$ (3,488)